Subscription broadcasts send to all your followers and are more regulated by Facebook. You can use them only for news. It has to be non-promotional in nature and cannot simply be focused on getting information from your audience. Here is how Facebook says these news updates should "inform people about recent or important events, or provide information in categories such as sports, finance, business, real estate, weather, traffic, politics, government, non-profit organizations, religion, celebrities, and entertainment."

When should I use Promotional Broadcasts?

Anytime you cannot use a Subscription broadcast, you can use a Promotional Broadcast. The only rules around promotional broadcasts are about who you can send it to. It can be sent to people who engaged with the bot in the last 24 hours and then one message after that. We handle the rules of who it can send to so if you use a promotional broadcast it will automatically only be sent to eligible followers.